C++ variable length arrays

[tepperly]

When compiling LiDO codevelop which includes Tribol as a submodule, I get a few warnings about variable length arrays:

[353/1053] Building CXX object tribol/src/tribol/CMakeFiles/tribol.dir/integ/Integration.cpp.o
/home/user/current/lido/lido-2.0/smith/serac/tribol/src/tribol/integ/Integration.cpp:155:14: warning: variable length arrays in C++ are a Clang extension [-Wvla-cxx-extension]
  155 |   RealT bary[elem.dim * numTriPoints];
      |              ^~~~~~~~~~~~~~~~~~~~~~~

/home/user/current/lido/lido-2.0/smith/serac/tribol/src/tribol/integ/Integration.cpp:227:12: warning: variable length arrays in C++ are a Clang extension [-Wvla-cxx-extension]
  227 |   RealT xc[elem.dim];